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Photomicrograph of the midgut of Aedes aegypti third-instar larvae (Diptera: Culicidae) stained with HE. (A) Squamocin at 50 ppm for 30 min; (B) Squamocin in 50 ppm for 60 min. (L) lumen, (N) nucleus, (v) vacuoles, (arrow) brush border. Bars: 10 μm.
